Question

12. What are the differences between the transport of materials in xylem and phloem?
13. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with
respect to their structure and functioning.​

Answer 1

Answer:

12ans-Xylem tissue helps in the transport of water and minerals. Phloem tissue helps in the transport of food. ... Transport in xylem requires physical forces such as transpiration pull. Transport of food in phloem requires energy in the form of ATP.

13ans-(i) Alveoli are tiny balloon-like structures present inside the lungs. (i) Nephrons are tubular structures present inside the kidneys. (ii) The walls of the alveoli are one cell thick and it contains an extensive network of blood capillaries.

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Answer 2

xylem transport water from root to upward direction but phloem transport food material in whole part of plant.

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